67080

Appears in sequences

• Numbers n such that n+1 and phi(n)+1 are both perfect squares.at n=33A089952
• Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 3,1 3,2 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155362
• First term of n-th difference sequence of (floor(Pi*k/2)), k >= 0.at n=18A325741